{
  "manageEntity": {
    "action": "Save",
    "entityId": "1074733",
    "entityType": "Track",
    "nonce": "0x2031038ad8934f889d0cb87c7f6fbc4c32810e96c87453234c80ca1ca960dc09",
    "signature": "0x349367cd26c6a5b7f10d48d3cf95f1b0bef9953cdb18ca9b3f0ca1a0d6787b8c45c53bca3bd8048d82f2ba6c4e208ce8d0e36c3def8206ee03c7784339dca8381c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}